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Subject: Re: How to determine the " common " of a Teac Motor taken out from a 5 1/4 disk drive??
Date: Sun, 19 Jan 2003 18:18:24 +0800
Organization: IMS Netvigator
X-Newsreader: Microsoft Outlook Express 5.00.2314.1300
I am working on this project
Look at the extreme left side of the schematics.
I paint leg 1 with "white correction fluid" and let it dry.
leg 1 connect to red PIN of a digital meter and leg 2 give 75.5 ohm
leg 1 connect to red PIN of a digital meter and leg 3 give 73.9 ohm
leg 1 connect to red PIN of a digital meter and leg 4 give 74.2 ohm
leg 1 connect to red PIN of a digital meter and leg 5 give 73.5 ohm
leg 2 connect to red PIN of a digital meter and leg 3 give 147.2 ohm
leg 2 connect to red PIN of a digital meter and leg 4 give 147.1 ohm +/-
leg 3 connect to red PIN of a digital meter and leg 4 give 147.1 ohm +/-
leg 4 connect to red PIN of a digital meter and leg 5 give 147.1 ohm +/-
The components have already soldered. But "nothing moves" at all.
I connected the max 232 according to this url
Any help appreciated.
Chuck Simmons wrote in message
> Laplace wrote:
> > http://www.cfsl.mb.ca/cfsl/best_p/Anx_d5.html this is what I used, teac
> > part no 14769070-90
> > This is how a determine the "common" of a stepper motor for a Stepper
> > project. The board is built but the stepper motor does not move at all.
> > There may be a lot of problem. I need to track down unknown/known
> > one by one.
> > My method of find the common of the stepper motor is tested by in the
> > following way.
> > leg 1
> > leg 2
> > leg 3
> > leg 4
> > leg 5
> > step 1 . if I apply 5 Volt +ve wire connects leg 1, -ve wire go to leg
> > ....leg 5 , the rotor will turn in one direction and move step by step.
> > step 2 if I apply 5 volt +ve wire connects leg 1, -ve wire go to leg 5,
> > 4 .... leg 2 , the rotor will turn in "opposite direction" and move
> > step.
> > If I am wrong, please correct me.
> > Laplace.
> First, what do you mean by common for a stepper?
> Second, measure and record the resistances from each wire to the others.
> This will tell you how the motor is wired in most cases.
> Third, I have not yet seen a stepper with a common except for the
> Superior Electric Slosyn synchronous motors. All others I have seen are
> 4 wire or 6 wire with no "common." (An exception is the Berger-Lahr five
> phase motors but you don't have one of those.)
> Caveat. Brushless DC motors are properly classed as stepper motors since
> they are magnetically identical to steppers. However, it is unusual to
> refer to a brushless DC motor as a stepper. Moreover, my comments refer
> to permanent magnet steppers which seem to be the most common type.
> ... The times have been,
> That, when the brains were out,
> the man would die. ... Macbeth
> Chuck Simmons firstname.lastname@example.org
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